Package org.eclipse.rdf4j.sail.inferencer.fc

Class CustomGraphQueryInferencer

java.lang.Object

org.eclipse.rdf4j.sail.helpers.SailWrapper

org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

org.eclipse.rdf4j.sail.inferencer.fc.CustomGraphQueryInferencer

All Implemented Interfaces:

FederatedServiceResolverClient, NotifyingSail, Sail, StackableSail

public class CustomGraphQueryInferencer
extends org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

A forward-chaining inferencer that infers new statements using a SPARQL graph query.

Author:

Dale Visser

Constructor Summary

Constructors

Constructor	Description
CustomGraphQueryInferencer()
CustomGraphQueryInferencer(QueryLanguage language, String queryText, String matcherText)	Create a new custom inferencer.
CustomGraphQueryInferencer(NotifyingSail baseSail, QueryLanguage language, String queryText, String matcherText)	Create a new custom inferencer.

Method Summary

Modifier and Type	Method	Description
InferencerConnection	getConnection()
Collection<org.eclipse.rdf4j.model.Value>	getWatchObjects()	Exposed for test purposes.
Collection<org.eclipse.rdf4j.model.Value>	getWatchPredicates()	Exposed for test purposes.
Collection<org.eclipse.rdf4j.model.Value>	getWatchSubjects()	Exposed for test purposes.
void	init()
void	setFields(QueryLanguage language, String queryText, String matcherText)	Called in order to set all the fields needed for the inferencer to function.

Methods inherited from class org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

addSailChangedListener, getBaseSail, removeSailChangedListener, setBaseSail

Methods inherited from class org.eclipse.rdf4j.sail.helpers.SailWrapper

getCollectionFactory, getDataDir, getDefaultIsolationLevel, getFederatedServiceResolver, getSupportedIsolationLevels, getValueFactory, isWritable, setDataDir, setFederatedServiceResolver, shutDown, verifyBaseSailSet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.rdf4j.sail.Sail

getCollectionFactory, getDataDir, getDefaultIsolationLevel, getSupportedIsolationLevels, getValueFactory, isWritable, setDataDir, shutDown

Constructor Detail

CustomGraphQueryInferencer

public CustomGraphQueryInferencer()

CustomGraphQueryInferencer

public CustomGraphQueryInferencer(QueryLanguage language,
                                  String queryText,
                                  String matcherText)
                           throws MalformedQueryException,
                                  UnsupportedQueryLanguageException,
                                  SailException

Create a new custom inferencer.

Parameters:

language - language that queryText and matcherText are expressed in

queryText - a query that returns an RDF graph of inferred statements to be added to the underlying Sail

matcherText - a query that returns an RDF graph of existing inferred statements already added previously

Throws:

MalformedQueryException - if there is a problem parsing either of the given queries

UnsupportedQueryLanguageException - if an unsupported query language is specified

SailException - if a problem occurs interpreting the rule pattern

CustomGraphQueryInferencer

public CustomGraphQueryInferencer(NotifyingSail baseSail,
                                  QueryLanguage language,
                                  String queryText,
                                  String matcherText)
                           throws MalformedQueryException,
                                  UnsupportedQueryLanguageException,
                                  SailException

Create a new custom inferencer.

Parameters:

baseSail - an underlying Sail, such as another inferencer or a SailRepository

language - language that queryText and matcherText are expressed in

queryText - a query that returns an RDF graph of inferred statements to be added to the underlying Sail

matcherText - a query that returns an RDF graph of existing inferred statements already added previously

Throws:

MalformedQueryException - if there is a problem parsing either of the given queries

UnsupportedQueryLanguageException

SailException - if a problem occurs interpreting the rule pattern

Method Detail

setFields

public final void setFields(QueryLanguage language,
                            String queryText,
                            String matcherText)
                     throws MalformedQueryException,
                            SailException

Called in order to set all the fields needed for the inferencer to function.

Parameters:

language - language that queryText and matcherText are expressed in

queryText - a query that returns an RDF graph of inferred statements to be added to the underlying Sail

matcherText - a query that returns an RDF graph of existing inferred statements already added previously

Throws:

MalformedQueryException - if there is a problem parsing either of the given queries

SailException - if a problem occurs interpreting the rule pattern

getConnection

public InferencerConnection getConnection()
                                   throws SailException

Specified by:

getConnection in interface NotifyingSail

Specified by:

getConnection in interface Sail

Overrides:

getConnection in class org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

Throws:

SailException

init

public void init()
          throws SailException

Specified by:

init in interface Sail

Overrides:

init in class org.eclipse.rdf4j.sail.helpers.SailWrapper

Throws:

SailException

getWatchSubjects

public Collection<org.eclipse.rdf4j.model.Value> getWatchSubjects()

Exposed for test purposes.

Returns:

a computed collection of the statement subjects that, when added or removed, trigger an update of inferred statements

getWatchPredicates

public Collection<org.eclipse.rdf4j.model.Value> getWatchPredicates()

Exposed for test purposes.

Returns:

a computed collection of the statement predicates that, when added or removed, trigger an update of inferred statements

getWatchObjects

public Collection<org.eclipse.rdf4j.model.Value> getWatchObjects()

Exposed for test purposes.

Returns:

a computed collection of the statement objects that, when added or removed, trigger an update of inferred statements